[Mac] Fix a bug where the moving a tab via an extension was failing. This was due to a lack of re-layout within the function that the TabModelObserverBridge calls within the TabStripController class, violating its contract.
[Mac] Fix a bug where the moving a tab via an extension was failing.
This was due to a lack of re-layout within the function that the TabModelObserverBridge calls within the TabStripController class, violating its contract.

BUG=40371
TEST=see bug for an example extension that tests this.

Review URL: http://codereview.chromium.org/3312006

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@58436 0039d316-1c4b-4281-b951-d872f2087c98

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